drm: cleanup buffer/map code

This is a patch from DRM CVS that cleans up some code that was in CVS
that I never moved to the kernel, this patch produces the result of the
cleanups and puts it into the kernel drm.

From: Eric Anholt <anholt@freebsd.org>, Jon Smirl, Dave Airlie
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/char/drm/radeon_cp.c b/drivers/char/drm/radeon_cp.c
index 20bcf872b348..8255cc6fdc28 100644
--- a/drivers/char/drm/radeon_cp.c
+++ b/drivers/char/drm/radeon_cp.c
@@ -2048,6 +2048,27 @@ int radeon_driver_preinit(struct drm_device *dev, unsigned long flags)
         return ret;
 }
 
+int radeon_presetup(struct drm_device *dev)
+{
+        int ret;
+        drm_local_map_t *map;
+        drm_radeon_private_t *dev_priv = dev->dev_private;
+
+        ret = drm_addmap(dev, drm_get_resource_start(dev, 2),
+                         drm_get_resource_len(dev, 2), _DRM_REGISTERS,
+                         _DRM_READ_ONLY, &dev_priv->mmio);
+        if (ret != 0)
+                return ret;
+
+        ret = drm_addmap(dev, drm_get_resource_start(dev, 0),
+                         drm_get_resource_len(dev, 0), _DRM_FRAME_BUFFER,
+                         _DRM_WRITE_COMBINING, &map);
+        if (ret != 0)
+                return ret;
+
+        return 0;
+}
+
 int radeon_driver_postcleanup(struct drm_device *dev)
 {
         drm_radeon_private_t *dev_priv = dev->dev_private;